Spin hammer



W. 'P. SENG.

SPIN HAMMER. APPLICATION F ILED SEPT.8. 1919.

1 3 692, Patented Oct. 3,1922.

Patented (let. 3, i922.

their: entire.

WENDELIN P. SEDTG, OF CHICAGO, ILLINOIS.

SPIN HAI/IMEE.

Application filed September 8, 1919.

To (a l w/iom it may concern- Be it known that I, lVnNniiLiN P. SENG, acitizen of the United States, residing at Chicago, in the county of Cookand State oi Illinois, have invented certain new and useful Improvementsin a Spin Hammer, of which the following is a specification.

This invention relates more particularly to a pneumatic hammer iorriveting and the like which is provided with means for rotating therivet set preferably driven by a sma l electric motor so that the deviceconstitutes an air hammer, electrically rotated. The principal object ofthe invention is therefore to provide a new and improved construction ofthis kind in which the rivet part oi the hammer is positively rotated asthe hamei' is operated. The invention consists in the novelconstruction, combination and arrangement of the several parts. In theaccompanying drawing Fig. l is a side elevation partly in section of adevice constructed in accordance with the principles of my invention;and Fig. 2 is a detail of the valve operating device; and Fig. 3 is adetail of the rotating means.

This invention relates to an air hammer in which the rivet set ismechanically ro tated continuously by means of an electric motor, sothat in the operation of using the hammer, the rivet set also positivelyrotates. The reason for this is that it has been found more satisfactoryto employ a rivet set which is somewhat flattened so that it extendsacross or diametrically of the rivet, and must be rotated in order thatthe rivet will be equally upset in all directions.

In carrying out this invention a standard or base 1 is provided with afoot lever 2 connected by means of a rod 3 with an operating lever l.This operating lever is mounted at the top of a yoke 5 which provides abearing 6 for a pneumatic hammer 7 which is slidable up and down in thebearin The upper end of the hammer is formed with a collar 8 which has apin head con nection with the end 9 of the operating lever 4 oppositeits oint of connection to the rod 8. At the upper end of the hammer 7 isa pipe elbow 10 to which a valve 11 is connected and extending from thevalve is a flexible connection 12 by means of which fluid under pressureis supplied to the hammer for operating it automatically in any wellknown manner Whenever the valve 11 Serial No. 322,470.

is opened. The valve has a stem 13 adapte}. to be engaged by a springpressed abutment 1% which is mounted on the top of the yoke 5, wheneverthe lever 4 is operated. This abutment carries a pin 15 which extendsthrough a slot 16 in a shell 17 inwhich the abutment is slidable and thespring 18 which presses the abutment upwardly is stronger than thatwhich tends to keep the valve on its seat, so that whenever the stem 13ot' the valve 11 is moved into engagement with the abutment, the valveisopened and the hammer is operated. The shell 17 may be adjustable onthe yoke 5 and the slot 16 permits a yielding movement of the abutmentl4 downwardly when the valve 11 is directly moved downwardly with thehammer by means of the operating lever 14, so that the hammer can followup the rivet as it is flattened out.

At the lower end of the hammer 7 is a housing 19 which has a perforatedprojection 20 through which extends a rod 21 projecting downwardly fromthe yoke parallel with the hammer, forming a guide for the "housing 19and preventing its rotation.

rocate at each stroke of the rivet set 24,

hileshing-with the worm/gear 27 i a worm 28 to which; a drive or pulleywheel 29 is attached.

which is connected by meansof afbelt 32 with the pulley 29.

Below the hammer, theyoke rormsa support for an adjustable anvil 83which may be threaded into the yoke and "provided with a set screw 34for holding it in place.

In operation the motor 30 drives the gear 26 and the rivet set 24constantly and positively, and the position of the motor is preferablysuch that the belt 82 is tightened as the hammer is moved to rivetingposition. This insures that the rivet set will be rotated without somuch danger of the belt slipping. The hammer is advanced to operatingposition and operated by the movement of the Mounted at the side of theyoke a motor 30 having a drive pulley 81.

pedal 2 which causes the valve 11 to be opened at the same time that thehammer is advanced by it to operating position. As soon as the pressureon the pedal is relieved the hammer is retracted by the operating leverand the valve 11 is closed, by means of a spring 35 preferably locatedin the base 1.

I claim:

1. The combination with a pneumatic hammer movabletoward and from itswork, of a valvefor controlling the hammer dependent upon the movementof the hammer in relation to the work, and means for independentlyrotating the hammer.

2. The combination with a pneumatic hammer having a movable rivet setand movable toward and from its work, of a valve to control theoperation of the hammer depending upon the movement thereof in relationto its work, and means for rotating the rivet set independently of thehammer.

3. The combination with a pneumatic hammerincluding a longitudinallymovable rivet set, means for moving the hammer toward and from its workand actuating the hammer by such movement, and means "for rotating therivet set independently of the movement of the rivet set toward and fromits work.

at. The combination with a pneumatic hammer, of a yoke by which it issupported, means for moving the hammer in the yoke and opening andclosing the fluid pressure connections to the hammer by such movement,the hammer including an independently movable rivet set which isreciprocated by the hammer in its riveting movement, and means inconnection with the rivet set for rotating it independently of itsmovement by the hammer and independently of its movement in the yoke.

5. The combination with a pneumatic hammer and anvil, the hammer beingmovable toward and from its anvil, of means for actuating the hammercontrolled by such movement, and other means for independently rotatingthe striking portion of the hammer without regard to its movement towardthe anvil or to its hammering action.

6. In a spin hammer, the combination with supporting means, of an airhammer mounted for reciprocation therein including a control valveopened and closed by such reciprocation and a reciprocating rivet set,means including a gear and worm'for rotating the rivet set independentlyof its reciprocation, and a driving member for continuously rotating thegear and worm.

7. In a spin hammer, the combination with a yoke forming a support, ofan air hammer reciprocable in the upper end of the yoke, means operatedby the reciprocating movement of the hammer for opening and closing airconnection thereto, a housing carried by the hammer, a guide extendingfrom the yoke to prevent the rotation of the housing, the hammerincluding a rivet set longitudinally movable for riveting action, a gearsupported in the housing and slidable relatively to the rivet set forrotating it independently of its longitudinal movement, a worm forrotating the gear, and driving means including a pulley supported by theyoke, and a driving belt for continuously operating said worm.

8. In a spin hammer, a reciprocable air hammer, a housing carriedthereby, means for preventing the rotation of the housing, the airhammer comprising a rivet set longitudinally m vable :l or rivetingaction with an angular portion intermediate its ends, a gear carried bythe housing and slidable on the angular portion, means with a pulleyattached thereto for rotating the gear, and driving means including afixed pulley, and a belt extending to the other pulley, the pulleysbeing so arranged that the belt is tightened when the air hammer isadvanced to its work.

9.'The combination with a support, of an air hammer mounted for verticalreciprocation in the support and adapted to be actuated by suchreciprocation, the air hammer including a longitudinally movable rivetset, and means for rotating the rivet set independently 0]": itslongitudinal movement, such means including a driving pulley fixed onthe support, and driving means including a pulley carried by such airhammer, with a flexible belt extending between said pulleys which istightened when the hammer advances the rivet set to riveting posi tion.

10. The combination with a fixed support, of an air hammer reciprocabletherein, having an air valve and a rivet set reciprocable for rivetingaction, means for advancing and withdrawing the hammer from its work andthereby opening and closing the valve, and an electric drive forrotating the rivet set independent of the reciprocation of the hammerand of the riveting action thereof.

WENDELIN P. SENG.

